U.S. water systems

Maryland Water Systems

Maryland

1,552 community water systems on record — 464 active, 1,088 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Maryland’s official records. Always confirm current status with Maryland before making decisions based on this information.

All community water systems in Maryland

System name	Mailing city	Population served	Status
WASHINGTON SUBURBAN SANITARY COMMISSION	LAUREL	1,900,000	Active
BALTIMORE CITY-BUREAU WATER SU	BALTIMORE	1,755,000	Inactive
CITY OF BALTIMORE	BALTIMORE	1,600,000	Active
PATUXEUNT PLANT WSSC	HYATTSVILLE	1,300,000	Inactive
POTOMAC PLANT WSSC	HYATTSVILLE	1,300,000	Inactive
WASHINGTON SUBURBAN SANITARY C	HYATTSVILLE	1,300,000	Inactive
ASHBURTON	BALTIMORE	500,000	Inactive
BALTIMORE CITY MUNICIPAL WORKS	BALTIMORE	500,000	Inactive
BALTIMORE CITY MUNICIPAL WORKS	BALTIMORE	500,000	Inactive
WSSC (INCLUDED IN 0150005)	LAUREL	482,000	Inactive
GLEN BURNIE-BROADNECK	MILLERSVILLE	290,606	Active
HOWARD COUNTY D.P.W. DISTRIBUTION	COLUMBIA	286,158	Active
ARNOLD WTP % ANNAPOLIS DPW	ANNAPOLIS	150,000	Inactive
OCEAN CITY	OCEAN CITY	150,000	Inactive
HARFORD COUNTY D.P.W.	ABINGDON	104,567	Active
CITY OF HAGERSTOWN	HAGERSTOWN	92,200	Active
WALDORF - CHARLES COUNTY DPW	—	84,296	Active
GLEN BURNIE ANNE ARUNDEL CO	GLEN BURNIE	78,000	Inactive
HARVNDALE PLANT	ANNAPOLIS	75,000	Inactive
NEW DESIGN - FREDERICK COUNTY	FREDERICK	74,911	Active
INDIVIDUAL WELL PLANT	ANNAPOLIS	72,204	Inactive
HAGERSTOWN	HAGERSTOWN	70,000	Inactive
CROFTON-ODENTON	MILLERSVILLE	62,986	Active
FORT GEORGE G. MEADE	FORT MEADE	62,234	Active
ELLIC. CITY-COLUMBIA HWD CO DP	ELLICOTT CITY	59,500	Inactive
CITY OF FREDERICK	FREDERICK	54,000	Active
CITY OF ROCKVILLE	—	52,000	Active
ELLICOTT CITY	COLUMBIA	46,000	Inactive
LEXINGTON PARK	CALIFORNIA	43,030	Active
ANNAPOLIS	ANNAPOLIS	40,000	Inactive
CUMBERLAND-EVITTS CREEK WATER	CUMBERLAND	40,000	Inactive
FORT GEORGE MEADE	—	40,000	Inactive
ROCKVILLE FILTRATION PLANT	ROCKVILLE	40,000	Inactive
CITY OF WESTMINSTER	WESTMINSTER	35,256	Active
CITY OF ANNAPOLIS	ANNAPOLIS	35,000	Active
BELAIR-BOWIE	BOWIE	32,000	Inactive
BELAIR-BOWIE WATER TREATMENT	BOWIE	31,000	Inactive
CITY OF SALISBURY	SALISBURY	30,343	Active
TOWN OF OCEAN CITY	OCEAN CITY	30,000	Active
FREDERICK	FREDERICK	28,000	Inactive
CITY OF CUMBERLAND	CUMBERLAND	27,039	Active
SEVERNA PARK-ANNE ARUNDEL CO	GLEN BURNIE	26,228	Inactive
SEVERNDALE PLANT	GLENN BURNIE	26,228	Inactive
BROAD CREEK	MILLERSVILLE	26,033	Active
CITY OF BOWIE	BOWIE	25,000	Active
FORT FOOTE PLANT WSSC	HYATTSVILLE	25,000	Inactive
FREEDOM DISTRICT	WESTMINSTER	24,867	Active
PATUXENT NAVAL AIR STATION (NAVFAC-WASH)	PATUXENT RIVER	22,000	Active
SALISBURY	SALISBURY	20,000	Inactive
CAMBRIDGE	CAMBRIDGE	19,000	Inactive
CITY OF ABERDEEN	ABERDEEN	18,006	Active
EASTON UTILITIES	EASTON	17,357	Active
TOWN OF ELKTON	ELKTON	15,625	Active
CHAPEL HILL - ABERDEEN PROVING GROUNDS	ABERDEEN	15,000	Active
CITY OF CAMBRIDGE WATER	CAMBRIDGE	15,000	Active
CITY OF HAVRE DE GRACE	HAVRE DE GRACE	14,000	Active
MARYLAND AMERICAN WATER COMPANY	BEL AIR	13,200	Active
ABERDEEN COMMISSIONERS	ABERDEEN	12,375	Inactive
MD CITY	ARNOLD	12,000	Inactive
OCEAN PINES	BERLIN	11,890	Active
TOWN OF LA PLATA	LA PLATA	11,535	Active
ABERDEEN PROV GRDS % US ARMY	ABERDEEN	11,000	Inactive
CITY OF FROSTBURG	FROSTBURG	11,000	Active
KINGS HEIGHTS-ANNE ARUNDEL CO	GLEN BURNIE	10,884	Inactive
BEL AIR	BEL AIR	10,200	Inactive
ANNE ARUNDEL CO DPW AMBERLY	GLEN BURNIE	10,000	Inactive
HAVRE DE GRACE MUN UTIL COMM	HAVRE DE GRACE	10,000	Inactive
LAVALE SANITARY COMMISSION	LAVALE	10,000	Inactive
LEXINGTON PK-ST MARYS CNTY MET	LEXINGTON PK	10,000	Inactive
TOWN OF MOUNT AIRY	MOUNT AIRY	9,890	Active
CHESAPEAKE RANCH ESTATES	LUSBY	9,500	Active
WALDORF	WALDORF	9,357	Inactive
WALDORF SANITARY DISTRICT	WALDORF	9,357	Inactive
CROFTON MEADOWS	ANNAPOLIS	9,200	Inactive
CROFTON-ANNE ARUNDEL CO	GLEN BURNIE	9,200	Inactive
STEVENSVILLE	STEVENSVILLE	9,155	Active
FROSTBURG	FROSTBURG	9,000	Inactive
U.S. NAVAL ACADEMY	ANNAPOLIS	8,700	Active
CROFTON-ANNE ARUNDEL DPW	CROFTON	8,600	Inactive
KING HEIGHTS-ANNE ARUNDEL DPW	ODENTON	8,600	Inactive
TOWN OF NORTH EAST	NORTH EAST	8,600	Active
ELKTON	ELKTON	8,500	Inactive
TOWN OF WALKERSVILLE	WALKERSVILLE	8,440	Active
JOPPATOWNE UTILITIES CORP	JOPPA	8,061	Inactive
ANDREWS AIR FORCE BASE	ANDREWWS AIR FORCE BASE	8,000	Inactive
FORT DETRICK	FREDERICK	7,900	Active
EASTON UTILITIES COMMISSION	EASTON	7,800	Inactive
FREEDOM DIST-CARROLL CO SAN CO	WESTMINSTER	7,500	Inactive
WESTMINSTER	WESTMINSTER	7,500	Inactive
CITY OF BRUNSWICK	BRUNSWICK	7,312	Active
CITY OF TANEYTOWN	TANEYTOWN	6,750	Active
PERRYMAN	BEL AIR	6,696	Inactive
TOWN OF HAMPSTEAD	HAMPSTEAD	6,600	Active
MARYLAND HOUSE OF CORRECTION	JESSUP	6,500	Inactive
MARYLAND HOUSE OF CORRECTION	JESSUP	6,500	Inactive
SPRINGFIELD STATE HOSPITAL	SYKESVILLE	6,500	Inactive
BRYANS ROAD	—	6,260	Active
TOWN OF THURMONT	THURMONT	6,200	Active
TOWN OF POOLESVILLE	POOLESVILLE	6,005	Active
EDGEWOOD ARSENAL	—	6,000	Inactive
MYSTIC HARBOUR	BERLIN	5,945	Active
CITY OF FRUITLAND	FRUITLAND	5,907	Active
EASTERN REGION ALLEGANY DISTRIB. SYSTEM	CUMBERLAND	5,703	Active
DEEP CREEK LAKE WATER SERVICE AREA	—	5,502	Active
LAVALE SANITARY COMMISSION	LAVALE	5,500	Active
NAVAL TRAINING CENTER	BAINBRIDGE	5,500	Inactive
MARYLAND AMERICAN WATER--SEVERN SYSTEM	BEL AIR	5,447	Active
FRANCIS SCOTT KEY	FREDERICK	5,400	Inactive
TOWN OF CHESTERTOWN	CHESTERTOWN	5,400	Active
AMBERLY	ANNAPOLIS	5,000	Inactive
MIDLAND-LONACONING	LONACONING	5,000	Active
SEVERNA PARK-ANNE ARUNDEL CO	SEVERNA PARK	5,000	Inactive
SPARROWS PT METHLEHEM STEEL CO	SPARROWS POINT	5,000	Inactive
TOWN OF CHESAPEAKE BEACH	CHESAPEAKE BEACH	5,000	Active
TOWN OF LEONARDTOWN	LEONARDTOWN	5,000	Active
WESTERN REGION ALLEGANY DISTRIB. SYSTEM	CUMBERLAND	4,955	Active
TOWN OF MANCHESTER	MANCHESTER	4,954	Active
ARNOLD-PINES ON THE SEVERN	GLEN BURNIE	4,588	Inactive
ARNOLD-PINES ON THE SEVERN	GLEN BURNIE	4,588	Inactive
CRISFIELD MAYOR AND COUNCIL	CRISFIELD	4,578	Inactive
CRAIN HIGHWAY	ARNOLD	4,500	Inactive
ELVATON ROAD	ARNOLD	4,500	Inactive
GLENDALE AA CO. D.U.	ARNOLD	4,500	Inactive
QUARTERFIELD	ANNAPOLIS	4,500	Inactive
STEVENSON ROAD AA CO. D.U.	ARNOLD	4,500	Inactive
TELEGRAPH ROAD	ARNOLD	4,500	Inactive
THELMA AVE.	ARNOLD	4,500	Inactive
TOWN OF BERLIN	BERLIN	4,500	Active
TOWN OF DELMAR	DELMAR	4,500	Active
TOWN OF DENTON	DENTON	4,500	Active
BILLINGSLEY ROAD	BILLINGSLEY	4,450	Inactive
JOHN HANSON	WALDORF	4,450	Inactive
PINEFIELD	ST CHARLES	4,450	Inactive
PINEY CHURCH	ST CHARLES	4,450	Inactive
SMALLWOOD WEST	ST CHARLES	4,450	Inactive
ST. CHARLES	LA PLATA	4,450	Inactive
ST. PAUL	ST CHARLES	4,450	Inactive
TOWNE PLAZA	ST CHARLES	4,450	Inactive
WALDORF	BEANTOWN	4,450	Inactive
WESTWOOD DR	LAPLATA	4,450	Inactive
WHITE OAK	ST CHARLES	4,450	Inactive
TOWN OF PERRYVILLE	PERRYVILLE	4,413	Active
MARYLAND CITY-ANNE ARUNDEL CO	GLEN BURNIE	4,404	Inactive
PRINCE FREDERICK	PRINCE FREDERICK	4,371	Active
TOWN OF MIDDLETOWN	MIDDLETOWN	4,288	Active
BOONSBORO - KEEDYSVILLE	BOONSBORO	4,250	Active
BELVEDERE HEIGHTS-A A CO	GLEN BURNIE	4,120	Inactive
BELVEDERE HEIGHTS-A A CO	GLEN BURNIE	4,120	Inactive
HOLLY HALL - SEE 007-0011	ELKTON	4,105	Inactive
CITY OF POCOMOKE CITY	POCOMOKE CITY	4,100	Active
TOWN OF INDIAN HEAD	INDIAN HEAD	4,100	Active
BETHLEHEM STEEL CORP	SPARROWS POINT	4,000	Inactive
CHESTERTOWN	CHESTERTOWN	4,000	Inactive
SUPERINTENDANT OF CORRECTIONS	—	4,000	Inactive
THE PROVINCES	DUNKIRK	3,991	Active
SOLOMONS	PRINCE FREDERICK	3,811	Active
POCOMOKE CITY MAYOR AND COUNCI	POCOMOKE CITY	3,800	Inactive
TOWN OF CHARLESTOWN	WILLARDS	3,791	Active
BRUNSWICK MAYOR AND COUNCIL	BRUNSWICK	3,600	Inactive
EASTERN CORRECTIONAL INSTITUTE	—	3,500	Active
ELKTON WEST	NEWARK	3,500	Active
WESTERNPORT	WESTERNPORT	3,500	Inactive
TOWN OF CENTREVILLE	CENTREVILLE	3,322	Active
NAVAL SUPPORT FACILITY, INDIAN HEAD	INDIAN HEAD	3,321	Active
TOWN OF PRINCESS ANNE	PRINCESS ANNE	3,300	Active
MARLBORO MEADOWS (CONNECTED TO WSSC)	SILVER SPRING	3,173	Inactive
COUNTRY LAKES	CALIFORNIA	3,016	Active
DELMAR WATER COMMISSION	DELMAR	3,000	Inactive
PERRY POINT V A HOSPITAL	PERRY POINT	3,000	Inactive
TOWN OF MOUNTAIN LAKE PARK	OAKLAND	3,000	Active
TOWN OF NORTH BEACH	NORTH BEACH	3,000	Active
TOWN OF OAKLAND BROADFORD PLNT	OAKLAND	3,000	Inactive
CITY OF CRISFIELD	CHRISFIELD	2,976	Active
TOWN OF EMMITSBURG	EMMITSBURG	2,921	Active
PRINCESS ANNE-SOMERSET CNTY SA	PRINCESS ANNE	2,900	Inactive
SNOW HILL	SNOW HILL	2,800	Inactive
THURMONT-MECHANICSTOWN WATER C	THURMONT	2,800	Inactive
CEDAR COVE	CALIFORNIA	2,728	Active
MARLBORO MEADOWS	—	2,700	Inactive
TOWN OF ST. MICHAELS	ST MICHAELS	2,650	Active
BEL AIR - PINTO DISTRIBUTION SYSTEM	DUNKIRK	2,614	Active
FOUNTAINDALE SOUTH	FREDERICK	2,610	Active
LAKE VILLAGE TOWNHOUSES	BALTIMORE	2,560	Inactive
BEL FOREST	BEL AIR	2,540	Inactive
CENTERVILLE TWN COMMISSONERS	CENTERVILLE	2,500	Inactive
CENTREVILLE TOWN COMMISSIONERS	CENTREVLL	2,500	Inactive
DENTON COMMISSIONERS	DENTON	2,500	Inactive
FEDERALSBURG MAYOR AND COUNCIL	FEDERALSBURG	2,500	Inactive
JOHNS HOPKINS UNIV APPL PHYS L	SCRAGGSVILLE	2,500	Inactive
LONOCONING WATER CO	LONACONING	2,500	Inactive
TOWN OF SMITHSBURG DISTRIBUTION SYSTEM	SMITHSBURG	2,500	Active
TOWN OF FEDERALSBURG	FEDERALSBURG	2,450	Active
WAKEFIELD VALLEY	WESTMINSTER	2,436	Active
TOWN OF SNOW HILL	SNOW HILL	2,409	Active
LAKE VILLAGE TOWNHOMES	SEVERN	2,400	Active
PERRYVILLE MAYOR & TOWN COUNCI	PERRYVILLE	2,400	Inactive
PIONEER CITY-WARFIELD WATER CO	COCKEYSVILLE	2,400	Inactive
TOWN OF WILLIAMSPORT DISTRIBUTION SYSTEM	WILLIAMSPORT	2,400	Active
GREENRIDGE SUBDIVISION	DUNKIRK	2,271	Active
HERALD HARBOR	MILLERSVILLE	2,241	Active

Showing the 200 largest of 1,552 systems on record, by population served. Browse by county above for the full list — every system has its own page, and all of them are in the sitemap.

Maryland Water Systems

Counties in Maryland

All community water systems in Maryland